Milk-can-washing machine



July 22, 1930.' H. D. LATHROP 1,770,931

MILK CANV WASHING MACHINE Filed May 27, 1927 '7 Sheets-Sheet 1 July `22, 1930. H. l5. LATHROP 1,770,931

MILK CAN WASHING MACHINE Filed May 27, 1927 l 7 Sheets-Sheet 2 July 22, 1930. d. D. WHR@ 1,770,931

MILK CAN WASHING MACHINE Filed May 2'7, 1927 '7 Sheets-Sheet 3 July 22, 1930. H. D. LATHRQP 1,770,931

MILK CAN WASHING MACHINE Filed May 27, 1927 '7 sheets-sheet v4 July 22, 1930. H. D. LATHROP MILK CAN WASHING MACHINE Filed May 27, 1927 '7 Sheets-Sheet 6 mmlum July 22., 1930. H. D. LAT'HROP v1,770,931

-MILK CAN WASHING MACHINE OPatented 2 2, 1930 Um-TED STATES PATENT, OFFICE 'HARRY n. Lariano?, or CHICAGO, ILLINOIS v l min-GAN-WASHINQQMACHI-NE Application mea may l27,

My invention relates to milk can washing machines and more particularly to that type of machine disclosed in my pending application, Serial Nu'mber 163,619, filed January 26, 1927.

Theprincipal object of-m-yinvention is to provide a 'can washing machine, which is en-` tirely automaticin operation, to convey and wash cans after they have been placed on the 0 machine.

-A further object of my invention is, to prol vide a machine of the above character having can conveying means forI conveying the cans to the washing apparatus, and a hood for inclosing the cans while the .washing operation to shift the carriage to operative and inoperative positions, incident to the movement of the conveyer means. Anothenobject of my invention resides in the provision of means for washing milk'l cans and their closures whether attached to the can or detached therefrom.

' My invention will be -best understood referring yto the accompanying drawings forming apart of this specification and, in which, 4 v

Figure 1 is an end elevatiqn of my improved can washing machine. .I Figure 2is a horizontal sectional view taken on' line 2 2 of Figure l1.

Figure 3 is a top plan view of my invention, having parts shown in section.

Figure 4 is a rear elevation of the hoodv embodied in my'inve'ntion.

Figure 5 is a longitudinal sectional taken on line 5 5 ofFigure 2.:

Figure 6 is a transverse-sectional view taken online 6 6 of Figure 2. Y

Figure 7 is a similar view taken on line 7 7 of Figure 2.

view

1927. ser1a1`n.194,598.

Figure 8 a sideelevation of that dis.

closed in Figure 4.

In thedrawings and furthe purpose of illustration, I haveshown the preferred embodiment of my invention'in which 5 represents a skeleton frame being constructed of angle iron including pairs of vertical. legs 6,

arranged at the endsof the frame and be ed. Extending transversely of the frame. adjacent its vopposite Vends are shafts 8 whose4 ends are loosely mounted in U-'shaped brackets or bearings 9. Fixed to each of these shafts,

' tween which a tank or reservoir`7 is supportadjacent one end, is apair of rollers 10, while a single roller 11 is ixed adjacent its opposite end (Figure 2).

A reciprocable carriage'12 is arranged for movement longitudinally of the frame and :comprises parallel angle bars 13, resting upon and movable on the rollers 10. Transverse bars 24 are riveted or otherwise, securedL to the angle bars 13 for connecting them together. Disposed upon opposite sides of the two adjacent angle bars A13, whichfare the in ner two employed in advancing the cans, are

angle guide rails 14, being engaged by bolts' 15 which pass through the frame 5. Spacing sleeves 16 are received upon each of these bolts and contact with the underface of the guide rails 14. A similar guide bar 17 is arranged along"the vother bar 13, and bolts 18 pass through the frame 5 and engage with said guide bar 17'. Received on these bolts are spacing sleeves 19. EXtending-longitudinaL lyof each of the adjacent bars 1.13 and disposed in spaced relation thereto are bars 20, and between each .angle bar 13 and the adjacent bar 20 there is pivotally mounted a d og 21. A pair of spaced bars 22 are attached to the remaining bar 13 which is employed in advancing the covers, and pivoted therebetween are a plurality of relatively long can a manner to be hereinafter referred to. It is l substantially rectangular in form and open l at the front to permit its passing over and enclosing can'swhile on said carriage.' Transveise portions 26 are provided in the hood to accord vindividual can compartments. Supported by the upper ends of the legs 6 is a pair of trackways 27 while a similar pair of trackways 28 is attached to the frame at a point in substantially the same horizontal plane as the carriage 12. A pair of rollers 29 are carried by the upper and lower ends of the hood at the front and rear respectively and are' movable on the trackways 27 and 28. U- shaped yokes 30 overlie the trackways 27 and have their ends attached to the legs 6 and serve to hold the upper rollers 29 against accidental derailment.

In order to reciprocate the carriage 12 and the hood 25 in timed relation, I have provided a fluid actuated mechanism, best shown in Figures 2, 3, 6 and 7. This fluid actuated mechanism comprises a cylinder 31 extended longitudinally of the frame 5 and suitably attached thereto. A piston 32', reciprocable in the cylinder-31 is secured to a piston rod 32 which has its forward end rigidly attached to the carriage 12 by means of a lateral arm 33. A second cylinder 34 extends transversely of the frame and is suitably attached thereto. Mounted in cylinder 34 is a piston 35 arranged to actuate a piston rod 3'5 which in turn actuates the hood 25 in a .manner to be hereinafter described.

A motor driven pump 38 is supported on the iframe 5 at one side of tlie tank 'i and has its inlet 39 adapted to receive water from said tank 7 and force it through the by-pass 40 communicating with the pump outlets 40. The main supply pipe 41 leads from the bypass 40, extends around one end of the tank 7, and communicates with the rear end of cylinder 34, through valve 48. Fixed to and depending from the rear wall of hood 25 is a plate 43 to which the piston rod 35 is secured by suitable nuts 36, for the purpose of reciprocating the hood 25 when the piston 35 is reciprocated. A pipe 37 leads from the pipe 41 and has an extension 37 which leads to the rearward end of cylinder 34 through the valve 42 as shown in Figure 7. .An exhaust pipe 44 leads fromv the rearward end of cylinder 34 through the valve 45. From the forward end of piston 34 an exhaust pipe 46 (Fig. 3) exhausts into the tank 7 through the valve 47.

Leading from the pipe 41 is a similar pipe 48 which leads into one end of cylinder r31 through the valve 49. An exhaust pipe 50 leads from the same end of cylinderv 31 and exhausts into tank 7 through the valve. 51. Leading from the pi e 48 is a'pipe 53 which leads to the other en of cylinder 31 throu h valve 54. An exhaust pipe leads from t e last said end of cylinder 31throu 'h the valve 56 and empties into the tank 7. he washing apparatus comprises a plurality of supply pipes 60, 61, 62`and 63 for supplying cold water, sodium water, hot waterand steam respectively. T he pipe 61 is connected with the by-pass 40, and gets its supply of sodium solution from the tank 7 by way of pump 38. Said pipes 60, 61,62 and 63 communicate with above the carriage along the length of the same and play upon the exterior of the cans as said cans are advanced in ari-.inverted position through the machine. The washing apparatus also contemplates means for washing the interior and exterior of the can lids and for that purpose, branchpipes 66 lead from each of the pipes to 63 inclusive and extend transversely across the frame 5, and from thence extend vertically to points above the carriage and to one si e of the needle sprays and communicate with U-shaped needle sprays'67. From each ofthe pipes 66 at points to one side of the carriage leads a short vertical pipe 68. Supported by and communicating with said pipe 68 are circular perforated spray heads 69. Forwashing the interior of the cans are provided vertical sprays 70 which -lead from the pipes 66, and which are'disposed between the rails 13 of said carriage 12. As shown in dotted lines in Figure 6, the cans are arranged in an inverted position on the carriage 12 with their open ends overlying said sprays 70. The can tops are the overhanging needle sprays 65 arranged supported Lin an angular position between the pipes and to the cylinder 34, Ihave provided an automatic control which consists of an angle plate 72 fixed to shaft- 73 by any suitable means and whose ends are journalled in bearings 74 projecting from the tank 7 at points inclose proximity to the supply pipes; said plate carries valve depressin heads 75 disposed in vertical alinement with spring' l seated valves 76 arranged in each of the pipes 60 to 63 inclusive. Plate 72 carries an extension 77 which is loosely connected with a rocker arm 78 yby means of ay pin 57 passing through a slot 58. The rocker arm 78 is rigidlysecured to a longitudinally extending rock shaft 59 which is journalled to the lower side of an angle bar 79in any suitable manner.

Extending .transversely of the frame 5 at the rear end thereof isa levjer 81 having one end pivoted tothe frame and-theother end movable in an oscillatory motion. Operatively connected with lever 81 intermediate of its ends is a rod 80 vextending beneath the hood Vto an oscillatory lever 82'which is rigid- 1y secured to an oscillatory shaft 83, journalled in bearings 84. A valve operating l 29 carried by the plate 85 is secured to shaft 83 as shown in and is slidably supported onbrackets 87011 the frame 5, and its forward end disposed in the path of movement',y of a lug 88 extending laterally from the carriage intermediate its lends; said lug 88 beingadapted to en age said rod 86 upon the return movement o the Carriage and thereby shift 'the lever 81 in the rearward direction which in turn 'shifts the p and exhaust valves of Y fluid from pipe 41 at 98 with across bar 99 oscillate valve operating members 100, se-

rods and 80( rearwardly' for operatingthe intake and exhaust valves of cylinder 34 as hereinbefore described.` A stop shoe lis rear end of the carriage 12, which is adapted to engage the lever 81 upon the forward movement of said carriage.

Secured to the rear sidel of hood 25 is a downwardly extending bar 89 which is adapted to engage lugs 91 (Fig. 2) and 92 (Fig. 7) on a reciprocal bar 93 slidably mounted in brackets 94 as shown in Figure 2. Said bar 93 is provided. with a, downwardly curved forward end 95'which is pivotally secured to a downwardly extending arm 96, which isA rigidly secured to the oscillatory shaft" 59. Extending downwardly from shaft59 and rigidly secured thereto is a lever 97 pivoted which is adapted to cured to the oscillatory shafts 101, when said shaft 59 is oscillated, for operating the intake cylinder 31.

In the opertion of my invention, sodium solution is pumped from the tank 7 through the by-pass 40 and through the pipe 41. Let

us assume the carriage 12 to be in its -rearward v posltion and the lug 88 in engagement with bar 86 which. holds the lever 81 rearwardly. When in this Iposition the lever 80 causes the member 82 to open valve 48 which admits tothe cylinder 34. l The valve operating member 82 holds the valve 47 closed when lthe valve 48 is h'eld open so as .to prevent the exhaust of'water from that -force the piston 35 end of the piston. I With the. lever 8 1 in the rearward position the rod 80 is holding the lever 82 in a rearward position which `through the medium of shaft '83 and the valve'V operating plate 85, causes open and the intake by permitting fluid the exhaustvalve 45 -to valve42 to close, therepressure from pipe 41 to in such a direction-as to remove the hood 25 from its normal position over'the carriage 12. l

When the hood 25 reaches its extreme limit inthe direction away from carriage 12 the bar '89 engages a lug 91 on. the.; bar 9 3 which causes said bfa'ry 93 to oscillate` the downwardly extending arm 96 and the shaft 59 to which said lbar 96 is rigidly secured- The arm 97 is likewise rigidly secured to the rock shaft59 and therefore operates the llever 99 whichthrough the medium of the valve operating member 100 opens the valve 49 permitting fluid pressure to pass from the pipe 41 through pipe 48 through the valve 49 and to the rear end of cylinder 31. The `iuidcoming into cylinder 31 forces the plston 32 forwardly and pushes the carriage 12 forwardly by Ameans of the yarm The milk cans to be washed are in position on the carriage 1-2 as indicated in Figures 6 and 7 and when the carriage moves forwardly the dogs 21 engage the cans and move them forwardly l along with the carriage, and at the same time the ogs 23 engage the can tops and move them forwardly. The hood 25 is now ready to be closed upon the cans and as the carriage 12 reaches' its extreme forward limit the member 90 on the rearward end of the carriage engagesthe bar 81, movingit'forwardly Which'nioves the levers 80 and 80 forwardly thereby reversing the valve action and permitting water to exhaust into the tank 7 through valve 47 closing the valve 48 and the valve 45 and opening the valve 42 which permits fluid pressure from the'pipe V 41 to pass into cylinder 34 through. the valve 42 and force the piston 35 in such a direction as to close Vthe hood about l the cans on the carriage 12. The piston rod 35 being rigidly secured to the depending bar 43 on-the hood 25 causes said hood to reciprocate with the piston rod 35.-

Wvhen the hood 2 5reaches its closed position the depending bar 89engagesa lug 92 on the bar 93 and oscillates the shaft 59 as previously described and thereby oscillates the arm 78 which in turn oscillates t-he angular member 77 about the shaft 73 which causes the valve operating plate 72 to be oscillated soas to open the valves 75 and permit fluid to pass through the pipes 664and Washthe cans which are under the hood. The shaft 59 having'oscillated as just described causes the bar'99 to reversethe operation of the valves on cylinder31, that is the'valve 49 is closed and valve 51'opened, which permits fluid toexhaust from the rearward end on permitting c linder 31. Valve 54 is opened,

uid` pressure to enter the forward end of `cylinder 31 and the exhaust valve 56 is closed.

While in this position fluid enters the for- Wardend of piston 31 and forces the piston 32 and 4piston 32 rearwardly, moving the carriage 12 rearwardly with it, and while the carriage is being moved from its extreme forward to its extreme rearward position-s, the washing process'is continued.

:When vthe carriage 12l reaches its extreme rearward position the valves of cylinder 34 are againfpositioned as they were atthe beginning` of this operation and the piston 35 1s again moved in suchl a direction as to remove the hood from its position over the cans on the carriage, and the valves 75 are again closed so that the spraying and washing operation is discontinued while the hood is lremovfed from over the carriage. It is obvious that the cans being the rearward movement of the carria e, but are moved forwardly by the dogs on t e carriage when said car is moved forwardly, and

vthe cans are washedL during the rearward y movement of the carriage andthe hood movesout of the way in order that the cans may be advanced again on the next forward movement of the carriage.

Having described vmy invention in its preerred form of construction, variation Without departin of the invention. I there to be limited to the exact details of construction ,illustrated and described but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having described my invention what I claim as new and desire to secure by Letters Patent is: v

1. An article washing machine comprising a frame', an intermittently operable conveyor from the spirit on said frame for conducting articles, step by step, along a predetermined path, washing means along 'the path of the conveyor for cleaning articles carried thereby, a hood mounted on said frame to move into and away from a position enclosing said washing means and the articles to be Washed, and means timed with the operation of said conveyor for alternately moving saidhood into and away from enclosing position during the pause in the movementof said conveyor.

2. Anarticle washing 4machine comprising vla frame, an intermittently operable conveyor on said frame Jfor conducting articlesfstep Vby step, along a predetermined path, Washing t means -along the vpath of the conveyor for cleaning articles carried thereby, a. hood mounted on said frame for movement at right angles to the 'path of travel of the articles yto be washed into and away from a position enclosing said washing means and said articles, means for alternatel moving said hood and conve or,- valves or controlalin the operation o said washing means'an means on said hood-for operating said valves while said articles are enclosed'by said hood.

` 3. An article washing machine comprising a frame, an intermittently operable conveyor on said frame for conducting articles, step by step, along a predetermined path, washthe'path of the conveyor,

articles carried thereby, ahood mounted on said frame to move into and away from a position enclosing said washing means and the washed do not return rearwardly with4 it is capable ofg ore do not wish articles to be washed, and means timed with the operation oisaid conveyor for alternately moving said hood into and away from enclosing position duringlthe pause in the movement of said conveyor.

4. An article washing machine comprising a frame, an intermittently operable conveyor on said frame for conducting articles, step by step, along a predetermined path, Washing means along the path of the conveyor for cleaning articles carried thereby, va hood mounted on said frame to move into and away from a position enclosing said washing means and the articles to be washed, means for imparting intermittent motion .to said l conveyor Vand means timed with the opera'r tionlof the conveyor for moving said hood to enclose the articles to be washed, subsequent @sto each forward movement of the conveyor. .5. An article washing machine comprising al frame, a recipocating conveyor 'mounted thereon for conducting receptacles along a redetermined path, washing means along thepath ofthe conveyor orcleaning receptacles carried thereby, a reciprocating hood mountedon said frame, and movable at right angles to said conveyor for intermittently enclosing said washing means and the receptacles to be washed, mechanism for alternatelyadvancing the conveyor and moving Vthe 'i hood to enclosing position and returning the same ,to first position in the same order, and means on said conveyor and said hood for pntrolling said mechanism.

6. A vcan 'washing machine comprising a frame, a reciprocating carriage mounted thereon, means carried by the carriage for moving Vcans alon other means carrie v ingaan covers along a path parallel withthe Nmovem'ei'xt of the cans, washing means along ers,fa reciprocating hood. mounted on said frame-orfmovement at right angles to said carriage for intermittently enclosing said washing means and said cans, means'for re-A ciprocating said carriage, and means timed with the operation of said carriage for movingsaid hood into and away from enclosing positionduring the pause inthe. movement of said carriage.

7.'A canavashing machine comprising a andja'waiy from-af position enclosing said' washing'means and the \can s to be washed, said conveyor comprising two can cover rest rail`s,vone of which is parallel with and spaced v.vertically and horizontally from the other, engaging elementsfor engaging and moving said'cans and covers, step by step, upon each the paths of movement of said cans and covsaid paths for cleaning said;

a predetermined path, by the carriage for mov-` forward operation ofthe conveyor, and means tlmed wlth the operatlonj of" said conveyorI for moving said hood into enclosing posltlonl during the pause in t-he movement of the conveyor. v l

l8. A can washing machine comprising -a frame, .a reciprocating carriage mounted thereon, means carried by the carriage for engaging and moving cans, step by step,

along a predetermined path, washing means arranged along said path-for cleaning said cans, an intermittently movable hood operable inltimed relation with and at right angles to said carriage for enclosing said washing .means and said cans while being washed,

Huid pressure means comprising-two cylinl ders, supported at right'angles to each other and having pistons therein, one ofsaid pistons being operatively connected to said carriage, means operatively connecting the other piston to said hood, means for forcing fluid into said cylinders to successively advance the carriage and move the hood into enclosing position, and means for releasing said fluid and permitting said carriage and said hood to be returned to their initial same order.

9. A can washing machine comprising a .'frame, a reciprocating carriage4 mounted thereon, means carried by the carriage for engaging and moving cans, step by step, along a predetermined path, washing means arranged along said path for cleaning said cans, an intermittently movable hood operable in timed relation with and at right angles to said carriage for enclosing said washing means and said cans while being washed, fluid pressure mans comprising two cylinders, supported at right angles to each other and having pistons therein, one of said pistons being operatively connected to said carriage, means operatively connecting the other piston to said hood, Ameans for forcing fluid into veyor for cleaning articlesca'rried thereb y,`

a hood mounted on said frame to move into and away -from a position enclosing said washing means and the articles to be washed, 'a piston operatively connected to said conveyor for intermittently operating said conveyor, and a piston operatively connected to said hood and operable in timed'relation to v the operation ofthe conveyor for. moving position in .the

said hoodto enclose the articles to be washed during the pause in the operation of the conveyor and subsequent to eahforward move-l ment thereof. r

1,1. A can washing machine comprising a frame, a -reciprocating carriage mounted thereon, means carried by the carriage for engaging and moving cans, step by step, along a predetermined path, washing means arranged -along said path for cleaning said cans, an intermittently movable hood operable in timed relation with and at right angles to said carriage, for enclosing said washing means and said cans while being washed, iuid pressure means comprising two cylinders, supported at right angles to each other and having pistons therein, one of said pistons being operatively connected to saidjcarriage, means operatively connecting the other piston to said hood, means for supplying fluid pressure to said cylinders for reciprocating said pistons, means timed with the movementof the carriage for alternately admitting Huid pressure to opposite ends of the cylinder having itspiston connected with said hood, and means timed with the movement of the hood for alternately admitting' iuid' pressure to opposite ends of the cylinder having its piston connected with the carriage.

12. A'can washing machine comprising a frame, a reciprocating carriage mountedv thereon,.means carried by the carriageforl engaging and moving cans, step 'by step, along a predetermined path, washing means arranged along said path for cleaning said,

cans, an intermittently movable hood operable in timed relation with and at right angles to said carriage for enclosing said washing means and said'cans, while being washed, iiuid pressure means comprising two cylinders supported at right angle s}to each other, and .having pistons therein, one of said pistons' being operatively connected to said carriage, means operatively connecting the other piston to said hood, means for supplying fluid pressure to said cylinders for reciprocating said pistons, valves operated by the carriage'at the ends of its movements for alternately admitting fluid pressure to opposlte sides of thepiston connected with the hood, and valves operated by the hood for alternately admitting fluid pressure to opposite sides of thepiston connected to the carriage.

[13. A can washing machine comprising a frame, a reciprocating carriage mounted thereon, means carried bythe carriage for engaging and 'moving cans, step by step,

along a predetermined path, washing means arranged along said path for cleaning said cans, an intermittently movable hood operable in' timed relation ,with and at right angles to said carriage for enclosing said washingmeans and said cans while being washed, fluid pressure' means comprxsmg two cylm- `and having pistons therein,

riage, means operatively connectlng the 1 other piston to said hood, means for forcing fluid into said cylinders to successively advance the carrlage and move the hood into enclosing posltion, and means for releasing said fluid 'and permitting said carriage and -connected .hood in timed relation with the operation of said hood to be returned to their'initial position inthesame order', said washing means comprising sprays, a plurality of pipes for supplying washing fluid to said sprays, normally .seated valves in vsaid pipes, a pivoted valve .depressing member supported-on said frame adjacent said valves for opening said valves, and means operated by the hood when in its enclosing position to move said member. and opensaid valves.

14. An article washing machine comprising a frame, an intermittently operable conveyor on said lframe for conducting articles, step by step, -along a predetermined path, washing means along the path of-the conveyor for cleaning articles carried thereby, a h'ood mounted on said trame to move into and away from a osition enclosing said washing means and t e articles to be washed, means for imparting intermittent motion to said conveyor, means for alternately moving said hood and conveyor, pipes for supplying washing iiuids to said washing means, spring pressed normally closed valves in said pipes, a pivoted valve depressing member supported on said trame adjacent'said valves, a pivoted element mounted on said /trame normally engaging said valve depressing member and means operable upon the movement ot the hood to its enclosing position to actu- Vate said pivoted element and open said valves.

15. An article washing machine comprising a frame, an intermittently operable conveyor on sa1d frame for conducting articles,e

step by step, along a predetermined path, washing means along the path of the conveyor for cleaning articles carried thereby, a hood mounted upon said trame to move into and away from a position enclosing said washing means and the articles to be washed, fluid pressure actuating means operatively connected with said hood to reciprocate said hood in timed relation with the operation of said conveyor.

`16. An article washing machine comprising a rame, an intermittently operable conveyor von said p frame for conducting articles, step by step,

along a predetermined path,

` washing means along the path of the con-k veyor for cleaning articles carried thereby, a

hood mounted upon said frame to move into and away from a position 'enclosing said washing meansand the articles to be washed, fluid ypressure actuating means operatively with said hood to reciprocate said said conveyor, and means for rendering said washing means operative when the hood is in a position enclosing the articles to be washed.

17. A can washing machinecomprising a frame, a reciprocating carriage mounted thereon, means carried by the carriage for engaging and moving cans, along a redetermined path, washing means arrange y cans, an intermittently `movable hood operable in timed relation with and at right angles tosaid carriage for enclosing said washing means and said cans while being washed, fluid pressure means comprising two 'cylinders supported at right angles to each other, and having pistons therein, one of said pistons being operatively connected to said carriage, means operatively connectinor the other piston'to said hood, a source oi? Huid pressure, means for transmitting fluid froms'aid source to said cylinders, valves for controlling the 'admission of fluid to and -from said cylinders, means actuated bythe movement ot said hood for controlling the operation of the valves which control the reci rocation of said hood, and means actuate by said hood for controlling the operation of the valves which control the reciprocation of said carriage. Y

18. A can washing machine comprising a frame, a reciprocating carriage mounted thereon, meanscarried by the carriage for engaging and moving cans,` step by step, along a predetermined path, washing means arranged along said path for cleaning said cans, an intermittently movable hood operable in timed relation with and at right angles to said carriage for enclosing said washing means and said cans while being washed, fluid pressure means comprising two cylinders supported at rightangles to each other, and having pistons therein, one of said pistons being operatively connected to said carriage, vmeans operatively connecting the other piston to said hood, a source of iiuid along said path for cleaning said i step by step,

pressure, means for transmitting iiuid from said source to said cylinders, trolling the admission of fluid to and from said cylinders, means actuated by the movement of said hood for controlling the operation of the valves whichcontrol the reciprocation of said hood, and means actuated bvsaid hood for controlling the operation- Aof 'the valves which control the reclprocation of said carriage, and means operated by said hood for controlling the supply of washing fluid to said washing means.

valves for con 19. A can washing machine comprising a trame, a reciprocating carriage mounted thereon, means carr1ed by the carriage or engaging and moving cans, step by step,

along a predetermined path, washing means arranged along said path for cleaning said cans, an intermittently movable hoodfop'erable in timed relation withand at -ri ht` anl gles to said carriage, for enclosing sai washing means and said cans While being Washed,- Huid pressure means comprismg two cyhn ,ders supported at right angles to .each other,

and having pistons therein, one of said pistons being operatively connected t0 said carrlage, means operatively connectm pressure, means for transmitting fluid from said source tolsaid cylinders, valves for controlling the admission of fluid to and from said cylinders, means actuated by the movement of said hood for controlling theo era- HARRY lD. LATHROPI the v other piston to saidhood, a source o uid 

